Atlantic Bio-Rock Pond Filter Media 52 cubic feet sack

With all the surface area but 25% less weight than lava rock and half the weight of gravel, expanded clay Bio-Rocks are the more stable, less abrasive alternative to heavyweight bio-media!

• Model: BB5200
• Bio-Rocks, 52 cubic feet, Super Sack

This media weighs approx. 2800 Lbs and will ship by motor freight